Integer overflow in the 16 bit variable reference counter in PHP 4 allows context-dependent attackers to execute arbitrary code by overflowing this counter, which causes the same variable to be destroyed twice, a related issue to CVE-2007-1286.
CVE-2007-1383
“—” beside the score: it is equal to NVD's CVSS score.
Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-01. NVD baseline CVSS 9.8; sources differ by 0.0.
- Public exploit code is available (Exploit-DB, marked verified by Exploit-DB)
No fix has been recorded since the CVE record was published in 2007 — if the vendor still supports the product, apply the fixed version it names; if not, isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.
- CVSS v3
- 9.8
- EG Score
- 9.8CRITICALmedium confidence
- EG Risk
- 85EG Risk 85/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity98% × 45%Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation65% × 40%EchelonGraph's fixed weight for EG-KEV Tier 2 (Weaponized): a constant, not a probability.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: No fix has been recorded since the CVE record was published in 2007. If the vendor still supports the product, apply the fixed version it names within your standard update timelines at low or medium mission impact and sooner than that at high; if it no longer does, isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product. - EPSS PROB
- 15%
- EPSS %ILE
- 96th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 15% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-22). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
No fix has been recorded since the CVE record was published in 2007. If the vendor still supports the product, apply the fixed version it names within your standard update timelines at low or medium mission impact and sooner than that at high; if it no longer does, isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
March 10, 2007
Last Modified
April 23, 2026
Advisory Details (4)
Auto-updated Oct 8, 2026PHP: Multiple vulnerabilities (GLSA 200703-21) — Gentoo security
http://security.gentoo.org/glsa/glsa-200703-21.xmlWeakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 20× in last 7d / 43× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 88 of 143 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 12 repeat rows among the latest 100 are merged into the row they repeat. The 55 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-23 16:25 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-23 14:07 UTCEG score recompute
- 2026-10-23 14:07 UTCGHSA enrichmentGHSA-259c-37px-2x76 · GitHub severity HIGH · GitHub CVSS 9.8
- 2026-10-22 16:25 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-22 13:23 UTCEG score recompute
- 2026-10-22 13:23 UTCGHSA enrichmentGHSA-259c-37px-2x76 · GitHub severity HIGH · GitHub CVSS 9.8
- 2026-10-21 16:25 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-21 12:38 UTCEG score recompute
- 2026-10-21 12:38 UTCGHSA enrichmentGHSA-259c-37px-2x76 · GitHub severity HIGH · GitHub CVSS 9.8
- 2026-10-20 16:25 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-20 11:55 UTCEG score recompute
- 2026-10-20 11:55 UTCGHSA enrichmentGHSA-259c-37px-2x76 · GitHub severity HIGH · GitHub CVSS 9.8
- 2026-10-19 16:25 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-19 11:11 UTCEG score recompute
- 2026-10-19 11:11 UTCGHSA enrichmentGHSA-259c-37px-2x76 · GitHub severity HIGH · GitHub CVSS 9.8
- 2026-10-18 08:20 UTCEG score recompute
- 2026-10-18 08:20 UTCGHSA enrichmentGHSA-259c-37px-2x76 · GitHub severity HIGH · GitHub CVSS 9.8
- 2026-10-17 16:25 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-17 07:36 UTCEG score recompute
- 2026-10-17 07:36 UTCGHSA enrichmentGHSA-259c-37px-2x76 · GitHub severity HIGH · GitHub CVSS 9.8
- 2026-10-16 16:25 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-16 06:51 UTCEG score recompute
- 2026-10-16 06:51 UTCGHSA enrichmentGHSA-259c-37px-2x76 · GitHub severity HIGH · GitHub CVSS 9.8
- 2026-10-15 16:25 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-15 05:34 UTCEG score recompute
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- 2026-10-15 05:34 UTCGHSA enrichmentGHSA-259c-37px-2x76 · GitHub severity HIGH · GitHub CVSS 9.8
- 2026-10-14 16:25 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-14 01:12 UTCEG score recompute
- 2026-10-14 01:12 UTCGHSA enrichmentGHSA-259c-37px-2x76 · GitHub severity HIGH · GitHub CVSS 9.8
- 2026-10-13 16:25 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-12 21:21 UTCEG score recompute
- 2026-10-12 21:21 UTCGHSA enrichmentGHSA-259c-37px-2x76 · GitHub severity HIGH · GitHub CVSS 9.8
- 2026-10-12 16:26 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-12 02:08 UTCEG score recompute
- 2026-10-11 13:37 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-10 19:53 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-09 19:59 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-08 16:32 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-07 23:36 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-06 15:08 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-10-05 17:37 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-09-30 14:57 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-09-29 07:39 UTCEG score recompute
- 2026-09-18 19:20 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-09-15 03:04 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-09-13 16:40 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-09-12 14:54 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-09-10 09:24 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-09-05 15:22 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-09-04 13:54 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-09-04 04:59 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-08-30 01:14 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-08-08 16:30 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-08-07 16:20 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-08-06 13:41 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-08-05 19:11 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-08-04 15:03 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-08-04 10:28 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-28 15:30 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-25 14:11 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-24 14:11 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-23 00:53 UTCEG score recompute
- 2026-07-23 00:32 UTCEG score recompute
- 2026-07-22 23:57 UTCEG score recompute
- 2026-07-22 21:36 UTCEG score recompute
- 2026-07-22 14:03 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-21 15:19 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-20 17:02 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-16 16:58 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-15 16:54 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-15 01:55 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-13 22:25 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-08 15:09 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-05 02:26 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-04 06:26 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-02 14:00 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-07-01 15:02 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-06-30 23:18 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-06-29 14:02 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-06-28 14:02 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-06-28 04:52 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-06-25 13:46 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-06-24 14:01 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-06-23 21:29 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-06-21 01:56 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-06-19 19:22 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-06-18 17:49 UTCEPSS rescoreEPSS 15% · 96th percentile
- 2026-06-17 17:49 UTCEPSS rescoreEPSS 15% · 96th percentile
Publicly available exploits
(1 reference)Public exploit code is referenced for this CVE (1 Exploit-DB entry). No fix has been recorded since the CVE record was published in 2007. If the vendor still supports the product, apply the fixed version it names; if it no longer does, isolate the affected system or retire the product.
- Exploit-DBEDB-3394✓ verifiedPublished Mar 1, 2007
PHP 4 - Userland ZVAL Reference Counter Overflow (PoC)
Open source ↗
Related CVEs(same CWE)
Same CWE
10 shownCWE-190
- CVE-2007-0221EG 7.8EPSS p99HIGH
- CVE-2006-5937EG 7.5EPSS p91HIGH
- CVE-2007-2949EG 6.8EPSS p94MEDIUM
- CVE-2006-4519EG 6.8EPSS p93MEDIUM
- CVE-2007-3387EG 6.8EPSS p95MEDIUM
- CVE-2007-2834EG 9.3EPSS p96HIGH
- CVE-2007-4965EG 5.8EPSS p97MEDIUM
- CVE-2006-3198EG 7.5EPSS p93HIGH
- CVE-2007-6353EG 7.5EPSS p92HIGH
- CVE-2008-1374EG 6.8EPSS p90MEDIUM
Frequently asked(5)
What is CVE-2007-1383?
When was CVE-2007-1383 made public?
Is CVE-2007-1383 actively exploited?
What is the CVSS score of CVE-2007-1383?
How do I remediate CVE-2007-1383?
Dependency Blast Radius
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